-inline void lttv_toolbars_add(LttvToolbars *h, lttvwindow_viewer_constructor f, char* tooltip, char ** pixmap, GtkWidget *widget)
+inline LttvToolbarClosure lttv_toolbars_add(LttvToolbars *h, lttvwindow_viewer_constructor f, char* tooltip, char ** pixmap, GtkWidget *widget)